RE: RPG - Software Architecture / Best practices

Hi Alan,

One of us is confused, so let's see who it is. The reason I say that is because what you're saying you can't do on a CRT* command, I say you can. In case it's a difference in version, I'm at IBM i 7.1.

On CRTPGM, there is the BNDDIR option where you can reference a binding directory. It's not module or service program specific. It will bind in whatever you have listed in the binding directory (I believe it will only bind in service programs that are referenced, I'm not sure if that stipulation occurs with modules or not).
CRTPGM PGM(X) BNDDIR(MYLIB/TESTBNDDIR)
CRTSRVPGM SRVPGM(X) BNDDIR(MYLIB/TESTBNDDIR)

We have a general purpose binding directory that houses quite a few of our service programs. We call it GENSRVPGMB. By default (template), our RPG programs include this in the H-Spec, and our CL programs include it in the (our) initialization section of the CL.


If we have a service program that binds in 3 modules, and those 3 modules are only for the service program, we would either list out those modules on the CRTSRVPGM command, or create a binding directory specific to the service program and have that binding directory pulled in in the H-specs of the program.

-Kurt

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Alan Campin
Sent: Thursday, January 31, 2013 5:26 PM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Re: RPG - Software Architecture / Best practices

OK, what does you CRTPGM or CRTSRVPGM look like? You have to specify the modules or put *ALL and the system searches through every module in the system. I have not quite figured out the purpose of having modules in binding directories if you have to specify them on the CRT command. There is no *BNDDIR option on the module name in the CRT command. That is why I have always used a make tool. Everything is specified in the header of the source.


On Thu, Jan 31, 2013 at 1:58 PM, Anderson, Kurt <KAnderson@xxxxxxxxxxxx>wrote:

Why aren't binding directories going to deal with multiple modules?

Copied this from a binding directory of ours:
DATEUTIL *MODULE *LIBL 11/12/09 13:14:33
GET_QUIRKS *MODULE *LIBL 11/12/09 13:14:41

-Kurt

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Alan Campin
Sent: Friday, January 25, 2013 10:49 AM
To: RPG programming on the IBM i (AS/400 and iSeries)
Subject: Re: RPG - Software Architecture / Best practices

But what about multiple modules? You need a make tool(See
www.think400.dk/downloads.htm and look for compile). Binding
directories are not going to deal with a multiple modules.


On Fri, Jan 25, 2013 at 10:44 AM, Buck Calabro <kc2hiz@xxxxxxxxx> wrote:

On 1/25/2013 9:46 AM, Charles MARTIN wrote:

I am a french software architect, in dotnet mainly.
I am not used to program in RPG, but I am working in it.

I have been asked to help RPG programmers to work in a different
way,

using best practices, design patterns, etc.

I am looking for advices, which could help me to get in the right

direction.

-snip-

What I would like to achieve is :

* Use a layered architecture (

https://en.wikipedia.org/wiki/Multitier_architecture)

o Presentation Layer
o Business Layer
o Data Layer

* Do TDD (

https://en.wikipedia.org/wiki/Test-driven_development)

o And later, BDD (

https://en.wikipedia.org/wiki/Behavior_driven_development)

I am doing a Proof of Concept with my colleagues, using the
"Service

programs" to do the layering.

That would be a good start.
I could not find something similar on the net.
Does that seems a good idea to you, the RPG experts ?
How would you do that ?

Sounds like a magnificent idea! To help your colleagues adapt, add
the service program to a binding directory, and put the binding
directory in your standard H-specification. Then your colleagues
can compile easily with PDM option 14 rather than a two step process
of creating a module, then a program. What has helped me is to tell
my colleagues that sub-procedures are nothing more than user-written
BIFs (built-in functions).

There is an open source RPGUnit service program available for TDD.
http://rpgunit.sourceforge.net/ It's not integrated into Eclipse,
but it's a start. A larger issue is how to create and maintain a
representative database - one that will exercise the edge cases properly.

Bonne chance!
--buck
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